[John Gardner](https://en.wikipedia.org/wiki/John_W._Gardner) writes in a very powerful essay on the value of investing in your own self renewal, lifelong learning, and breaking out of the prisons we create for ourselves to create purpose and meaning.
We can't write off the danger of complacency, growing rigidity, imprisonment by our own comfortable habits and opinions. Look around you. How many people whom you know well -- people even younger than yourselves --are already trapped in fixed attitudes and habits. A famous French writer said "There are people whose clocks stop at a certain point in their lives."
Take 10 minutes to read this essay - you won't regret it.